Q26.The difference between the radii of 3rd and 4th orbits of L2+i is ΔR1 . The difference between the radii of 3rd and 4th orbits of He+ ΔR2. Ratio ΔR1 : ΔR2 is : (1) 8 : 3 (2) 3 : 8 (3) 2 : 3 (4) 3 : 2
What This Question Tests
This question tests the application of Bohr's model formula for the radius of an orbit in hydrogenic atoms and its dependence on principal quantum number (n) and atomic number (Z).
Concepts Tested
Formulas Used
r_n = 0.529 n² / Z Å
📚 NCERT Sections This Tests
12.7 — The Radius Of The Innermost Electron Orbit Of A Hydrogen Atom Is
Physics Class 12 · Chapter 12
12.7 The radius of the innermost electron orbit of a hydrogen atom is 5.3×10–11 m. What are the radii of the n = 2 and n =3 orbits?
12.6 — (A) Using The Bohr’S Model Calculate The Speed Of The Electron In A
Physics Class 12 · Chapter 12
12.6 (a) Using the Bohr’s model calculate the speed of the electron in a hydrogen atom in the n = 1, 2, and 3 levels. (b) Calculate the orbital period in each of these levels.
12.1 — (A) No Different From
Physics Class 12 · Chapter 12
12.1 (a) No different from (b) Thomson’s model; Rutherford’s model (c) Rutherford’s model (d) Thomson’s model; Rutherford’s model (e) Both the models
📋 Question Details
- Chapter
- Atoms
- Topic
- Bohr's model and radii of orbits
- Year
- 2020
- Shift
- 05 Sep Shift 1
- Q Number
- Q26
- Type
- MCQ
- NCERT Ref
- Class 12 Physics Ch 12: Atoms
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